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authorChristophe Roullier <christophe.roullier@st.com>2019-11-07 09:47:54 +0100
committerDavid S. Miller <davem@davemloft.net>2019-11-08 11:21:04 -0800
commitcaee3174731ca342f8e418c642ae780ea9664a73 (patch)
tree8b6afa97e545b2db014580f482d4fae686ecaf48 /drivers/net/ethernet/stmicro
parenttipc: eliminate checking netns if node established (diff)
downloadlinux-dev-caee3174731ca342f8e418c642ae780ea9664a73.tar.xz
linux-dev-caee3174731ca342f8e418c642ae780ea9664a73.zip
net: ethernet: stmmac: Add support for syscfg clock
Add optional support for syscfg clock in dwmac-stm32.c Now Syscfg clock is activated automatically when syscfg registers are used Signed-off-by: Christophe Roullier <christophe.roullier@st.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c23
1 files changed, 8 insertions, 15 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
index 595af2ec89fb..95ffaec4ab42 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
@@ -155,18 +155,14 @@ static int stm32mp1_clk_prepare(struct stm32_dwmac *dwmac, bool prepare)
ret = clk_prepare_enable(dwmac->syscfg_clk);
if (ret)
return ret;
-
- if (dwmac->clk_eth_ck) {
- ret = clk_prepare_enable(dwmac->clk_eth_ck);
- if (ret) {
- clk_disable_unprepare(dwmac->syscfg_clk);
+ ret = clk_prepare_enable(dwmac->clk_eth_ck);
+ if (ret) {
+ clk_disable_unprepare(dwmac->syscfg_clk);
return ret;
- }
}
} else {
clk_disable_unprepare(dwmac->syscfg_clk);
- if (dwmac->clk_eth_ck)
- clk_disable_unprepare(dwmac->clk_eth_ck);
+ clk_disable_unprepare(dwmac->clk_eth_ck);
}
return ret;
}
@@ -320,12 +316,10 @@ static int stm32mp1_parse_data(struct stm32_dwmac *dwmac,
return PTR_ERR(dwmac->clk_ethstp);
}
- /* Clock for sysconfig */
+ /* Optional Clock for sysconfig */
dwmac->syscfg_clk = devm_clk_get(dev, "syscfg-clk");
- if (IS_ERR(dwmac->syscfg_clk)) {
- dev_err(dev, "No syscfg clock provided...\n");
- return PTR_ERR(dwmac->syscfg_clk);
- }
+ if (IS_ERR(dwmac->syscfg_clk))
+ dwmac->syscfg_clk = NULL;
/* Get IRQ information early to have an ability to ask for deferred
* probe if needed before we went too far with resource allocation.
@@ -437,8 +431,7 @@ static int stm32mp1_suspend(struct stm32_dwmac *dwmac)
clk_disable_unprepare(dwmac->clk_tx);
clk_disable_unprepare(dwmac->syscfg_clk);
- if (dwmac->clk_eth_ck)
- clk_disable_unprepare(dwmac->clk_eth_ck);
+ clk_disable_unprepare(dwmac->clk_eth_ck);
return ret;
}